// Copyright 2022 ByteDance and/or its affiliates
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package etcdproxy

import (
	"context"

	"github.com/pkg/errors"
	"go.etcd.io/etcd/api/v3/etcdserverpb"
	"go.etcd.io/etcd/api/v3/mvccpb"
)

type disabledEtcdProxy struct{}

func NewDisabledEtcdProxy() EtcdProxy {
	return disabledEtcdProxy{}
}

var errDisabled = errors.New("etcd proxy is disabled")

func (d disabledEtcdProxy) EtcdProxyEnabled() bool {
	return false
}

func (d disabledEtcdProxy) Txn(ctx context.Context, txn *etcdserverpb.TxnRequest) (*etcdserverpb.TxnResponse, error) {
	return nil, errDisabled
}

func (d disabledEtcdProxy) Watch(ctx context.Context, key string, revision uint64) (<-chan []*mvccpb.Event, error) {
	return nil, errDisabled
}
